The Exploration of SpaceHarper, 1959 - 200 pagini |
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Pagina 112
... telescope of , say , twenty - inch aperture to the Moon . It could here , in many fields of research , far surpass ... telescopes , it would be a vastly simpler engineering proposition to do this on the Moon than on the Earth , since the ...
... telescope of , say , twenty - inch aperture to the Moon . It could here , in many fields of research , far surpass ... telescopes , it would be a vastly simpler engineering proposition to do this on the Moon than on the Earth , since the ...
Pagina 149
... telescope ) but even so its resolving power — that is , its ability to separate close objects — is thousands of ... telescopes literally miles in diameter - and still , thanks to their weightlessness , make them movable . The assembly ...
... telescope ) but even so its resolving power — that is , its ability to separate close objects — is thousands of ... telescopes literally miles in diameter - and still , thanks to their weightlessness , make them movable . The assembly ...
Pagina 160
... telescope some of the great star clusters look like collections of jewels glittering against the blackness of space . There are eight stars ( two of them double ) within ten light- years of the Sun. ( This unit , the distance light ...
... telescope some of the great star clusters look like collections of jewels glittering against the blackness of space . There are eight stars ( two of them double ) within ten light- years of the Sun. ( This unit , the distance light ...
Cuprins
The Shaping of the Dream | 1 |
Navigation and Communication in Space | 78 |
1 | 118 |
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acceleration airless asteroids astronautics astronomers atmosphere body bricks build carry certainly Chapter chemical completely course crew diameter difficult distance Earth energy engineering enormous escape velocity exploration extremely fact Figure free orbit fuel Galaxy gases gravitational field gravity heat hundred hydrogen imagine important interplanetary flight interplanetary travel interstellar ionosphere journey Jupiter landing LEWIS CARROLL light light-years lunar Mars and Venus Martian means Mercury meteors miles million minutes missiles Moon Moon's motors never normal observed orbit oxygen payload perhaps planetary Plate Pluto possible pounds pressure probably problem produce propellant propulsion Proxima Centauri R. A. Smith radar radiation radio reach reason refueling rocket power satellite Saturn scientific ship Solar System space space-flight space-stations space-suits space-travel spaceship speed spinning stars stations structure sunlight surface take-off tanks telescope temperature thousand thrust trolley Uranus vehicle voyage weight weightless